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Rotation of polarization axis of injection lasers with viewing direction

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2 Author(s)
Sommers, H. ; RCA Laboratories, Princeton, NJ, USA ; North, D.O.

It is shown theoretically that in lasers with box modes and polarization determined by facet reflectivity, the axis of polarization rotates with viewing direction. For thin double-heterojunction (DHJ) cavities, the angle ρ between the junction plane and the E field of the radiation depends on the angles θ and φ in the junction plane and transverse to it, \rho \approx 10^{-2}\theta\phi in degrees. It is suggested that this behavior is a useful test for control of polarization by facet reflection. Measurements show the relation is followed in wide sawed lasers with good box modes prepared from a thin DHJ wafer and in a narrow stripe laser from the same wafer. A second narrow stripe laser from the wafer and a single-heterojunction (SHJ) cavity have no such dependence. Qualitative discussion of the measurements reveals information about polarization and mode properties not previously available.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:12 ,  Issue: 4 )